Thread: 350 Horsepower Question

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Id have no problem installing 396 or 402 heads on a 454, infact some of the early closed chamber castings flow better than many of the heads used on 454s, espesially the peanut ports.
some of the 283s & 327s shared the same head...so, I mean that comment doesnt make a whole lot of sense to me.
I wont disagree that some of the heads used on the 400s didnt flow big #s, they werent intended to. its called low speed velocity.
& you can have the same effect using 305 heads on the 350, they dont flow big #s...and in some cases thats just fine.

However, looking at the cam he is using & the fact that he is using 3" exhaust...it doesnt look like he intends on having a low rpm torque motor ,that is using velocity. If he were, than Id consider smaller exhaust & a very differant camshaft.

I never said 45cubic inches is a big deal...unless your talking about a cylinder head that offered just adaquete performance on the smaller displacement engine & expect the same from the larger engine. The 305 heads will do OK....however...seems like an odd combo to me, I could be wrong, but there are so many better choices.

As far as my grasp on math....I dont know what your point is. as far as my knowledge on stock parts goes..Im no Grumpy Jenkins...but I think I know enough to stay out of trouble. Since you used the 402 head on a 454 as an example...maybe your knowledge of stock parts is questionable.

The H.O.305 head does flow decent & yes better than some 350 or 400 heads.... but we dont use those 350 & 400 heads for performance applications. John